Buggy code:
case SELECT : Select select = ( ( Select ) ( target ) ) ; if ( select . isSetOptgroupOrOption ( ) ) { for ( int j = 0 ; j < ( select . getOptgroupOrOption ( ) . size ( ) ) ; j ++ ) { AbstractJaxb obj = select . getOptgroupOrOption ( ) . get ( j ) ; if ( id . equals ( obj . getId ( ) ) ) { select . getOptgroupOrOption ( ) . remove ( j ) ; return true ; } else { if ( RemoveByIdUtil . removeById ( id , obj ) ) { return true ; } } } } break ; case SMALL : Small small = ( ( Small ) ( target ) ) ; if ( small . isSetContent ( ) ) { return RemoveByIdUtil . removeByIdWithinObjectList ( id , small . getContent ( ) ) ; } break ; case SPAN : Span span = ( ( Span ) ( target ) ) ; if ( span . isSetContent ( ) ) { return RemoveByIdUtil . removeByIdWithinObjectList ( id , span . getContent ( ) ) ; } break ; case STRIKE : Strike strike = ( ( Strike ) ( target ) ) ; if ( strike . isSetContent ( ) ) { return RemoveByIdUtil . removeByIdWithinObjectList ( id , strike . getContent ( ) ) ; } break ; case STRONG : Strong strong = ( ( Strong ) ( target ) ) ; if ( strong . isSetContent ( ) ) { return RemoveByIdUtil . removeByIdWithinObjectList ( id , strong . getContent ( ) ) ; } break ; case STYLE : break ; case SUB : Sub sub = ( ( Sub ) ( target ) ) ; if ( sub . isSetContent ( ) ) { return RemoveByIdUtil . removeByIdWithinObjectList ( id , sub . getContent ( ) ) ; } break ; case SUP : Sup sup = ( ( Sup ) ( target ) ) ; if ( sup . isSetContent ( ) ) { return RemoveByIdUtil . removeByIdWithinObjectList ( id , sup . getContent ( ) ) ; } break ; case TABLE : Table table = ( ( Table ) ( target ) ) ; if ( table . isSetCaption ( ) ) { Caption capt = table . getCaption ( ) ; if ( ( capt . isSetId ( ) ) && ( id . equals ( capt . getId ( ) ) ) ) { table . setCaption ( null ) ; return true ; } else { if ( RemoveByIdUtil . removeByIdWithinObjectList ( id , capt . getContent ( ) ) ) { return true ; } } } if ( table . isSetCol ( ) ) { for ( int j = 0 ; j < ( table . getCol ( ) . size ( ) ) ; j ++ ) { Col col2 = table . getCol ( ) . get ( j ) ; if ( ( col2 . isSetId ( ) ) && ( col2 . getId ( ) . equals ( id ) ) ) { table . getCol ( ) . remove ( j ) ; return true ; } } } if ( table . isSetColgroup ( ) ) { for ( int j = 0 ; j < ( table . getColgroup ( ) . size ( ) ) ; j ++ ) { Colgroup cg = table . getColgroup ( ) . get ( j ) ; if ( ( cg . isSetId ( ) ) && ( cg . getId ( ) . equals ( id ) ) ) { table . getColgroup ( ) . remove ( j ) ; return true ; } } } if ( table . isSetTbody ( ) ) { for ( int j = 0 ; j < ( table . getTbody ( ) . size ( ) ) ; j ++ ) { Tbody tbody = table . getTbody ( ) . get ( j ) ; <START_BUG> if ( ( tbody . isSetId ( ) ) && ( tbody . getId ( ) . equals ( tbody ) ) ) { <END_BUG> table . getTbody ( ) . remove ( j ) ; return true ; } else { if ( RemoveByIdUtil . removeById ( id , tbody ) ) { return true ; } } } } if ( table . isSetThead ( ) ) { Thead thead = table . getThead ( ) ; if ( ( thead . isSetId ( ) ) && ( thead . getId ( ) . equals ( id ) ) ) { table . setThead ( null ) ; return true ; } else { if ( RemoveByIdUtil . removeById ( id , thead ) ) { return true ; } } } if ( table . isSetTfoot ( ) ) { Tfoot tfoot = table . getTfoot ( ) ; if ( ( tfoot . isSetId ( ) ) && ( tfoot . getId ( ) . equals ( id ) ) ) { table . setTfoot ( null ) ; return true ; } else { if ( RemoveByIdUtil . removeById ( id , tfoot ) ) { return true ; } } } if ( table . isSetTr ( ) ) { for ( int j = 0 ; j < ( table . getTr ( ) . size ( ) ) ; j ++ ) { Tr tr = table . getTr ( ) . get ( j ) ; if ( ( tr . isSetId ( ) ) && ( tr . getId ( ) . equals ( id ) ) ) { table . getTr ( ) . remove ( j ) ; return true ; } else { if ( RemoveByIdUtil . removeById ( id , tr ) ) { return true ; } }

Fix:
if ( ( tbody . isSetId ( ) ) && ( tbody . getId ( ) . equals ( id ) ) ) {